Woodruff Keys – Machine Keys - Taper Pins – Standard Horse Nail Company - Stanho Machine keys, woodruff keys, taper pins, solid pins, threaded taper, gib head, metric woodruff keys, hi-pro keys, non-rock keys, dowel pins knurled, grooved pins, hollow dowel, cotter pins, precision cutting services, custom machining, standard horse nail, corporation, abc, Pennsylvania, pa, usa, manufactured Manufacturer of standard machine keys, woodruff keys, taper pins and cotter pins, Standard Horse Nail Company has been manufacturing keys and pins and precision fasteners in the USA since 1872.